Diagnostic device



FIG. 1 is a top perspective view of a diagnostic device showing our new design in accordance with an embodiment of the invention;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a bottom perspective view thereof. 

CLAIM The ornamental design for a diagnostic device, as shown and described. 